Yes, or ceiling mount a projector. You can either get the retractable screen, or if your walls are already white use them for the screen. I think you can even get some special paint that gives the wall a brighter sheen thus making it a better background.

This works really great if you have drop ceilings in your office, you can run all of your cables down the inside of the wall, or use one of those surface mount wire tracks to bring them down from the ceiling to your PC.

How big is the room? A projector might be easier for everyone to see; a 52" screen isn't really that big if someone's sitting a few feet back.

Good thinking on the SFF computer, you generally don't need anything too crazy in a conference room. A nice touch is to wall mount it in the back so there's not a computer on the table.

Do you have a good phone in there? One of the best things I did for our conference room was adding a Polycom conference phone with remote mics; it was a huge upgrade from the standard desk phone no one could hear you on.

For video conf, make sure the lighting is appropriate (as in anything BUT Fluorescent Light and it must be indirect. Otherwise the person on the other end will have a very hard time seeing what is going on.

Also consider painting the room in a light blue, this helps with the lighting.

Yes, or ceiling mount a projector. You can either get the retractable screen, or if your walls are already white use them for the screen. I think you can even get some special paint that gives the wall a brighter sheen thus making it a better background.

This works really great if you have drop ceilings in your office, you can run all of your cables down the inside of the wall, or use one of those surface mount wire tracks to bring them down from the ceiling to your PC.

Surround sound. That makes it really great when you are there at night and using the large monitor for your on-line gami....

Wait, I've said too much...

damn, stole my thunder! haha....

I've set a few of these up and every one that I have setup with a projector has turned out much better, especially for space. You can hang the projector from the ceiling. +1 for the Polycom phones - work great. If you can mount your speakers from the ceiling or in the walls, the sound is much better than just having a couple on one side of the room.